1	Base of vegetative stems forming a stout caudex; leaves (especially toward stem apex) and calyx lobes with white cartilaginous margin and midrib keel.		(2)
+	Base of vegetative axis usually slender; leaves and calyx lobes without white cartilaginous margin and midrib keel.		(4)
2 (1)	Basal and rosette leaves distinctly contracted into petioles; calyx lobes obovate to spatulate, base distinctly narrowed		35 Gentiana stipitata
+	Basal and rosette leaves not distinctly contracted into petioles; calyx lobes lanceolate, elliptic, or elliptic-triangular, base scarcely narrowed.		(3)
3 (2)	Corolla white with blue stripes and greenish spots when fresh, drying pale yellow or pale blue; lobes 5-6 mm		36 Gentiana szechenyii
+	Corolla ruddy purple with paler base when fresh, usually without stripes or spots; lobes 7-10 mm		37 Gentiana georgei
4 (1)	Calyx lobes dissimilar in shape to upper leaves; plicae always asymmetrical.		(5)
+	Calyx lobes similar in shape to upper leaves; plicae always symmetrical.		(10)
5 (4)	Flower in clusters of more than 3; stamens equal.		(6)
+	Flowers 1-3; stamens unequal.		(8)
6 (5)	Basal rosettes none or poorly developed; lowermost stem leaves scalelike, membranous		29 Gentiana rigescens
+	Basal rosettes usually well developed; lowermost stem leaves not scalelike but with expanded herbaceous blades.		(7)
7 (6)	Stems 3-15(-28) cm; corolla lobes caudate		30 Gentiana davidii
+	Stems (10-)20-50 cm; corolla lobes not caudate		31 Gentiana cephalantha
8 (5)	Flowers 4merous; corolla nearly cylindric		32 Gentiana jingdongensis
+	Flowers 5merous; corolla funnelform.		(9)
9 (8)	Blades of rosette leaves obovate to elliptic, abruptly narrowed into a petiole; corolla blue		33 Gentiana melandriifolia
+	Blades of rosette leaves narrowly spatulate to oblong-oblanceolate, gradually narrowed into a petiole; corolla rose		34 Gentiana duclouxii
10 (4)	Stem leaves in whorls of 3-8.		(11)
+	Stem leaves opposite.		(17)
11 (10)	Corolla lobes without a caudate tip.		(12)
+	Corolla lobes with a caudate tip to 3 mm.		(14)
12 (11)	Margin of stem leaves and calyx lobes scabrous-ciliate		38 Gentiana ecaudata
+	Margin of stem leaves and calyx lobes smooth.		(13)
13 (12)	Flowering stems with largest leaves toward apex; corolla 4.5-6 cm, lobe margin entire		39 Gentiana ternifolia
+	Flowering stems with largest leaves near middle; corolla 2.5-4.2 cm, lobe margin erose		40 Gentiana yakushimensis
14 (11)	Style 5-7 mm; corolla narrowly obconic		44 Gentiana viatrix
+	Style 3-5 mm; corolla tubular to tubular-campanulate.		(15)
15 (14)	Corolla lobes 2-2.5 mm, caudate tip less than 1 mm; stamens inserted just below middle of corolla tube		41 Gentiana tetraphylla
+	Corolla lobes 4-6 mm, caudate tip 2-2.5 mm; stamens inserted at basal part of corolla tube.		(16)
16 (15)	Upper stem leaves and calyx lobes linear-spatulate, apex acute to obtuse		42 Gentiana hexaphylla
+	Upper stem leaves and calyx lobes linear, apex acuminate		43 Gentiana arethusae
17 (10)	Corolla 1.5-2 cm; calyx lobes spreading		46 Gentiana altigena
+	Corolla 2.5-7.5 cm; calyx lobes straight or ascending.		(18)
18 (17)	Basal rosettes or abbreviated vegetative shoots generally present at flowering time, their leaves usually conspicuously longer than those of flowering stems.		(19)
+	Basal rosettes and abbreviated vegetative shoots generally poorly developed or absent at flowering time, lowest leaves sometimes smaller and/or wider but not longer nor otherwise well differentiated.		(21)
19 (18)	Stems papillate; corolla narrowly funnelform, 4-6 cm		50 Gentiana veitchiorum
+	Stems not papillate; corolla campanulate, 2.5-4.7 cm.		(20)
20 (19)	Corolla lobes 4.5-6 mm; plicae 2-3 mm; anthers 3-3.5 mm		51 Gentiana nyalamensis
+	Corolla lobes 2.5-3.5 mm; plicae 0.5-1 mm; anthers 1.5-2 mm		52 Gentiana ornata
21 (18)	Upper stem leaves orbicular, ovate, or elliptic.		(22)
+	Upper stem leaves linear or linear-lanceolate.		(25)
22 (21)	Basal rosette absent; corolla cylindric		45 Gentiana prolata
+	Basal rosette present; corolla not cylindric.		(23)
23 (22)	Corolla dark blue, obconic, lobes usually mucronate		47 Gentiana obconica
+	Corolla pale blue, not obconic, lobes not mucronate.		(24)
24 (23)	All stem leaves elliptic		48 Gentiana altorum
+	Lower stem leaves ovate, upper ones elliptic		49 Gentiana caelestis
25 (21)	Flowering stems 3-5 cm; corolla 3-3.8(-4.5) cm, lobes 3-4 mm; plicae 1.5-2 mm		55 Gentiana oreodoxa
+	Flowering stems 5-15(-20) cm; corolla 5-7.5 cm, lobes 6-9 mm; plicae 2-5 mm.		(26)
26 (25)	Flowers usually pedicellate.		(27)
+	Flowers sessile.		(28)
27 (26)	Calyx lobes and middle to upper leaves broadly linear, 2-3 mm wide; corolla campanulate-tubular, inflated at middle of tube; anthers 3.5-4 mm		53 Gentiana dolichocalyx
+	Calyx lobes and middle to upper leaves linear, often 1-1.5 mm wide; corolla narrowly obconic to funnelform; anthers 2.5-3 mm		54 Gentiana lawrencei
28 (26)	Corolla 7-7.5 cm, inner surface blue-purple		56 Gentiana helophila
+	Corolla 5-6 cm, inner surface blue.		(29)
29 (28)	Corolla conspicuously spotted; lower stem leaves oblong		57 Gentiana futtereri
+	Corolla unspotted or inconspicuously spotted; lower stem leaves linear-lanceolate		58 Gentiana sinoornata